Martha James (1796-1853) married David Ivall (1795-1850) in 1829. David later created a highly successful coachmaking business and became wealthy (see the article on his life). They had seven children (of which six survived to become adults) and have numerous living descendants.
Dennis Endean Ivall (1921-2006), my second cousin once removed, did excellent research on Ivall family history between 1955 and 1985 and in 2004 sent me a copy of what he had found, including the table below showing the ancestry of Martha James, tracing her descent from the early kings of England. It goes back 15 generations to Edward III (1327-77) or 23 generations to William I, known as William the Conqueror (1027-87).
Martha's father was the Reverend Samuel James MA. He was born c 1754, matriculated from Oriel College, Oxford on 13 March 1773 (aged 18), was granted a BA in 1776 and a MA in 1782. He became the Rector of Radstock in Somerset in 1780 and died in 1813, aged about 59.